Actigraphy Reliability with Normal Sleepers

Ustinov, Yuriy; Lichstein, Kenneth L.

doi:10.1080/15402002.2012.688779

Cited by 25 publications

(15 citation statements)

References 11 publications

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“…In a medication adherence study of a predominantly middle-aged community sample (N ¼ 48; 36 -87 years), there was a linear increase in omission errors over two months of investigation (Morrell, Park, Kidder, & Martin, 1997). Similarly, in an actigraphy study with a middle-aged sample (N ¼ 60; 35-65 years of age), missing data were shown to increase over a period of five weeks (Ustinov & Lichstein, 2013). PM performance in a time-logging task was also shown to decrease over days within one week, although this effect was reported as small and observed predominantly in younger participants (in their 20s), rather than in the older age groups (60s or 80+; Rendell & Thomson, 1999).…”

Section: Introductionmentioning

confidence: 87%

Naturalistic prospective memory in older adults: Predictors of performance on a habitual task

Cavuoto

Ong

Pike

et al. 2015

Neuropsychological Rehabilitation

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Age-related difficulties in episodic prospective memory (PM) are common. However, little is known about habitual PM, which involves remembering to carry out intended actions that are regular and repeated. This is important for many health-related tasks and for maintaining independence in daily living activities. This study investigates, in older people, the predictors of habitual PM performance in a naturalistic setting. A group of 191 community-based, older adults (aged 65-89 years) wore an actigraph over two weeks. The habitual PM task involved pressing a button twice daily (Bed-time, Rise-time) on the actigraph. Accuracy of response was calculated for Bed-time and Rise-time, determined by light, movement, and diary data. The contribution of retrospective memory and executive function to PM performance was assessed. PM was more accurate at Bed-time compared to Rise-time (p < .01), and better in the first compared to the second week (p < .01). Retrospective memory contributed small but significant unique variance (β = .24) to PM accuracy. For older adults living in the community, both contextual factors (e.g., time of day) and retrospective memory are important for individuals' ability to remember to perform daily tasks. This is relevant when planning interventions for maintaining independent living in ageing.

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Section: Introductionmentioning

confidence: 87%

Naturalistic prospective memory in older adults: Predictors of performance on a habitual task

Cavuoto

Ong

Pike

et al. 2015

Neuropsychological Rehabilitation

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“…Therefore, some studies reported that sleep latency is the most unreliable sleep parameter measured by actigraphy. 27,28 Furthermore, a meta-analysis using polysomnography found that the ADHD patient group and the control group were not significantly different in terms of sleep latency. Polysomnography measures the time of sleep latency to sleep stage 2, using the results of EEG, electrooculography, and electromyography, while actigraphy measures sleep latency as the time from lying in bed or turning off the light to the first epoch of inactivity of at least 10 minutes.…”

Section: Discussionmentioning

confidence: 99%

“…Also, actigraphy-based sleep parameters are closely correlated with polysomnography results. 27,28 Sleep restrictions or sleep disturbance in ADHD patients could lead on to neurobehavioral dysfunction, especially vigilance and attention. [29][30][31] Also, topographical electroencephalogram (EEG) study showed neuromaturational delay in ADHD patients.…”

Section: Introductionmentioning

confidence: 99%

Sleep and cognitive problems in patients with attention-deficit hyperactivity disorder

Jeong

Kim

et al. 2015

Sleep Medicine

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“…Although it is well accepted that the use of actigraphy is best validated in normal sleepers, 54 we contend that it is a preferable tool to use in pregnant women. Based on our data, it appears that pregnant women fall into the category of "normal sleepers" rather than "abnormal sleepers," i.e.…”

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confidence: 99%

“…This is important to acknowledge since length of data collection correlates with degree of intra-individual variability. 54 The concomitant use of diaries and actigraphy affords the opportunity to comment on the use of actigraphy in pregnant women.…”

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confidence: 99%

Minimal Effect of Daytime Napping Behavior on Nocturnal Sleep in Pregnant Women

Ebert

Wood

Okun

2015

Journal of Clinical Sleep Medicine

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Study Objectives: To assess whether daytime naps negatively impact nocturnal sleep. Design: Longitudinal, prospective cohort design. Participants: 161 pregnant women recruited and evaluated in early gestation (10-20 weeks). Measurements and Results: Daily sleep information was collected in three 2-week periods (10-12, 14-16, and 18-20 weeks gestation) with a daily sleep diary and an actigraph. The average number of naps, as well as the average length of each nap, were calculated from sleep diaries. Women were categorized fi rst as non nappers (0 naps/2-week period), moderate nappers (1-3 naps/2-week period), or frequent nappers (≥ 4 naps/2-week period). Then, based on the average nap length, they were categorized as short (< 90 min) or long (≥ 90 min) nappers. Nocturnal sleep parameters included SOL, WASO, SE, and TST. SAS procedure MIXED was used for modeling the main effects of nap group and time, and time by nap group interactions. Women who took naps had a decrease in diary-assessed nocturnal TST, but not actigraphy-assessed TST. This observation was group-and time-specifi c. There were no other group differences. Women who napped ≥ 90 min had poorer diary-assessed SE and lower diary-assessed TST than those who took shorter naps. Length of nap was not associated with any other sleep measures. Conclusions:The number of daytime naps have minimal impact on nocturnal sleep parameters; however, long nappers did exhibit modestly impaired sleep continuity and sleep quality. Overall, we propose that daytime naps provide a benefi cial countermeasure to the sleep disruption commonly reported by pregnant women. This may be clinically benefi cial given that sleep continuity and quality are important correlates of pregnancy outcomes. T he majority of expectant women experience progressively disturbed, fragmented, and shortened nocturnal sleep as a result of normal physiological adaptations to the progressing pregnancy.1-3 Emerging evidence indicates that insuffi cient quantity and poor sleep quality are associated with increased risk of mood dysregulation , 4,5 as well as adverse pregnancy outcomes, such as preterm birth and gestational diabete s. 6-8When suffi cient nighttime sleep is not possible or unattainable, certain strategies can be implemented to counteract the negative effects of disturbed nocturnal sleep. One promising approach is to include daytime naps as part of a healthy sleep hygiene progra m. 9-11There is limited information examining the effects of daytime naps on nocturnal sleep outcomes in non-pregnant populations. The majority of evidence stems from examination of daytime naps in elderly or middle-aged individuals or children. The bulk, however, consider daytime naps as a positive health behavior (a "countermeasure") in that they can effectively combat subjectively reported poor sleep quality and decrease subjective daytime sleepiness by augmenting shortened nocturnal sleep durat ion.11-14 However, there is also a small literature that suggests that naps can be detrimental to nocturnal sleep and ne...

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Actigraphy Reliability with Normal Sleepers

Cited by 25 publications

References 11 publications

Naturalistic prospective memory in older adults: Predictors of performance on a habitual task

Naturalistic prospective memory in older adults: Predictors of performance on a habitual task

Sleep and cognitive problems in patients with attention-deficit hyperactivity disorder

Minimal Effect of Daytime Napping Behavior on Nocturnal Sleep in Pregnant Women

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